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Surface protection film and optical part bonded with the surface protection film

A surface protection film, peeling film technology, applied in the direction of optical elements, optics, film/sheet adhesives, etc., can solve the problem of difficult to stick FPR film and so on

Active Publication Date: 2021-06-15
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the surface of an optical film such as a polarizer is contaminated with an adhesive or an antistatic agent used in a surface protection film, there is a problem that it is difficult to attach the FPR film

Method used

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  • Surface protection film and optical part bonded with the surface protection film
  • Surface protection film and optical part bonded with the surface protection film
  • Surface protection film and optical part bonded with the surface protection film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] (Preparation of surface protection film)

[0081] 5 parts by weight of addition reaction silicone (manufactured by Dow Corning Toray Co., Ltd., trade name: SRX-345), 7.5 parts by weight of tri-n-butylmethylammonium bis( 10% ethyl acetate solution of trifluoromethanesulfonyl)imide (manufactured by 3M Company, FC-4400), 0.75 parts by weight of tetraethylene glycol di-2-ethylhexanoate, 95 parts by weight of toluene and acetic acid A mixed solvent of 1:1 ethyl ester and 0.05 parts by weight of a platinum catalyst (manufactured by Dow Corning Toray Co., Ltd., trade name: SRX-212) were mixed, stirred and mixed to prepare a release agent layer for forming Example 1 paint. On the surface of a polyethylene terephthalate film with a thickness of 38 μm, the paint used to form the release agent layer of Example 1 was coated with a Meyer bar so that the thickness after drying was 0.2 μm, and a 120° C. Dry in a hot air circulation oven for 1 minute to obtain the peeling film of Exa...

Embodiment 2

[0091] In addition to replacing the adhesive composition of Example 1, using 58 parts by weight of 2-ethylhexyl acrylate, 38 parts by weight of butyl acrylate, and 4 parts by weight of 2-hydroxyethyl acrylate A 30% ethyl acetate solution of an adhesive polymer composed of a copolymer of , and an adhesive composition obtained by adding and mixing 1.2 parts by weight of an isocyanate curing agent (manufactured by TOSOH CORPORATION, trade name: CORONATE (registered trademark) HX) In addition, similarly to Example 1, the surface protection film of Example 2 was obtained.

Embodiment 3

[0093] In addition to replacing the adhesive composition of Example 1, an adhesive polymer composed of a copolymer of 96 parts by weight of 2-ethylhexyl acrylate and 4 parts by weight of 2-hydroxyethyl acrylate was used relative to 100 parts by weight. 30% ethyl acetate solution, adding and mixing 1.2 parts by weight of an isocyanate curing agent (manufactured by TOSOH CORPORATION, trade name: CORONATE (registered trademark) HX) adhesive composition, the same as in Example 1 , Obtain the surface protection film of embodiment 3.

[0094] The method and results of the evaluation test are shown below.

[0095]

[0096] A sample of the surface protection film was cut into a width of 50 mm and a length of 150 mm. Under the test environment of 23°C×50%RH, use a tensile testing machine to measure the strength when peeling off the peeling film in the direction of 180° at a peeling speed of 300mm / min, and use this as the peeling force of the peeling film (N / 50mm ).

[0097]

[0...

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Abstract

The present invention provides a surface that can be used even for optical films having irregularities on the surface, has less contamination to adherends, does not change over time in low contamination of adherends, and has excellent anti-peeling electrostatic properties that do not deteriorate over time Protective films and optical parts using them. A surface protection film (10), which is formed by bonding a release film (5) with a release agent layer (4) on the adhesive layer (2), and the release film (5) is formed on one side of the resin film (3) The release agent layer (4) is laminated on top, and the release agent layer (4) contains a release agent mainly composed of polydimethylsiloxane, an antistatic agent that does not react with the release agent, and contains at least one ether bond. The ester plasticizer, the antistatic agent component is an ionic compound with a melting point of less than 30°C, the antistatic agent component and the ester plasticizer are transferred from the release agent layer (4) of the release film (5) to the adhesive layer The surface of (2) reduces the peeling static voltage when peeling the adhesive layer (2) from the adherend.

Description

technical field [0001] The present invention relates to a surface protection film bonded to the surface of optical components (hereinafter, sometimes referred to as an optical film) such as a polarizing plate, a retardation plate, and a lens film for a display. More specifically, to provide a surface protection film with less contamination to an adherend, further, to provide a surface protection film having excellent anti-peeling electrostatic properties that do not deteriorate with time, and an optical device using the surface protection film. part. Background technique [0002] Conventionally, optical films such as polarizing plates, retardation plates, lens films for displays, anti-reflection films, hard coat films, transparent conductive films for touch panels, and displays using these films have been used. When producing products, a surface protection film is attached to the surface of the optical film to prevent dirt or scratches on the surface in subsequent processes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/40B32B7/04G02B1/14
CPCC09J133/08C09J2203/318C09J7/401C09J2301/122C09J2301/30G02B1/14C09J7/40G02B1/04G02B5/3041
Inventor 小林弘幸春日充新见洋人铃木千惠五十岚智美木俣绘美子林益史
Owner FUJIMORI KOGYO CO LTD
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